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首先简要介绍了基于磁阻传感器和MEMS加速度计的电子罗盘在载体姿态确定方面的应用,分析了其与GPS组合导航的重要意义;接着在阐述地磁场背景知识的前提下,介绍了电子罗盘测姿的基本方法;随后根据电子罗盘的自身特性及工作环境,详细分析了使用电子罗盘测姿过程中可能存在的误差及其来源,并根据实际使用要求给出了2种误差校正方法。
Firstly, the application of the electronic compass based on the magnetoresistive sensor and MEMS accelerometer is briefly introduced. The importance of GPS compass navigation is analyzed. Then, on the premise of explaining the background of geomagnetic field, Then, according to the characteristics and working environment of the electronic compass, the possible errors and their sources in the process of measuring and using the electronic compass are analyzed in detail. And two kinds of error correction methods are given according to the practical requirements.